Microalgae cultivation systems fed with wastewater as source of nutrients represents the principal sustainable condition to produce microalgal biomass to be converted conveniently to biofuels. In order to optimize microalgae growth and their lipid content, the effect of light intensity and nutrients load in real wastewater was investigated through batch microalgal cultivation tests. A microalgal polyculture was used as inoculum and grown for 10 days in batch at different conditions of light intensity (i.e. 20, 50 and 100 µmol s^-1m^-2) and nutrients concentration in wastewater. Experimental results showed that biomass productivity decreased for rich nutrients conditions and increased for high light intensities. The highest lipid mass content (29%) was found for high light intensity condition (100 µmol s^-1m^-2). Furthermore, microalgae settleability tests, conducted at the end of the cultivation time, resulted in the highest biomass recovery efficiency (72%) for low light intensity and nutrients supply conditions.

以废水作为养分来源的微藻栽培系统代表了生产微藻生物质以方便地转化为生物燃料的主要可持续条件。为了优化微藻的生长及其脂质含量，通过分批微藻培养试验研究了光强度和养分负荷对实际废水的影响。使用微藻类混合培养物作为接种物，并在不同的光强度条件下（即20、50和100μmols ^-1 m ^-2）分批生长10天。）和废水中的养分浓度。实验结果表明，在营养丰富的条件下，生物量生产力下降，而在高光照条件下，生物量生产力上升。在高光强度条件下（100 µmol s ^-1 m ^-2），脂类含量最高（29％）。此外，在培养时间结束时进行的微藻沉降性测试在低光照强度和养分供应条件下获得了最高的生物量回收效率（72％）。